The word is a backronym for the phrase "Are you okay?" It is using the names of four elements on the periodic table to spell out a common question. it can be interpreted as a way of expressing concern for someone's well-being or as a way of offering support.

(Well if you count actually typing the entire thing, instead of actually typing as soon as you can to know their well being which is more of a priority than being excessive and all that.)
"Argon Europium Oxygen Potassium (ArEuOK) is a backronym created by taking the first letters of the elements argon, europium, oxygen, and potassium. The phrase is used as a way to ask someone if they are feeling well or if they are experiencing any problems. It can also be used as a way to show that you care about someone and that you are interested in their well-being.

Here is it being used in a sentence:

"Hey, ArEuOK? I haven't heard from you in a while."
"I'm feeling a little down today. ArEuOK?"

or excessively

"Hey, Argon Europium Oxygen Potassium? I haven't heard from you in a while."
"I'm feeling a little down today. Argon Europium Oxygen Potassium?"
by IridescentPoppycock August 4, 2023
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It stands for C-O-C-K
Person 1: How did your date go?
Person 2: So bad, turns out she doesn't like Carbon oxygen carbon potassium
by Ranpapis big toe March 9, 2023
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